for the “mirror room” use the “room” settings that follows:
75% 75% 50% 66% 33%

for “ghosting” your reverb:
70% 100% 100% 25% 66% (reverse)

for rockab’ thing:
33% 33% 100% 0% 50% (accu spring)

for post-rock and ambient stuff:
66% 75% 100% 0% 50% (hall)

for echoing…echoing…echoing:
50% 0% 33% 33% 66% (echo)

for weird things:
50% 66% 25% 75% 50%

the cathedral is best in stereo than mono for what i’ve tried…
and yours?